Method of producing ferro-silico-magnesium alloy



STA

a; i iii GUSTAV PISTOR, 0F FRANKFORT-ON-THE-MAIN, AND ALBERT BEIELSTEINAND ADOLF BECK, 0F IBITTERFIELD, GERMANY, ASSIGNOBS TO THE FIRM OF CHE-MISCHE FABRIK GRIESHEIM-ELEKTRN, OF FRANKFORT-ON-THE-MAIN, GER- MANY, ACORPORATION OF GERMANY.

METHOD OF PRODUCING FERRo-slLICo MAGNEslUM ALLOY.

No Drawing. Application filed November 11, 1916, Serial No. 130,908.

Specification of Letters Patent.

Serial No. 443,222.

To allwhom it may concern:

Be it known that We, GUsTAv PISTOR, AL- BERT BEIELSTEIN, and AnoLF BECK,all subjects of Germany and residents of Frankforton-the-Main, Germany,and Bitterfeld, Gen many, respectively, have invented certain new anduseful Improvements in the Method of Producing Ferro-Silico-MagnesiumAlloy, of which the'following is a specification.

Our invention relates to the production of an alloy containing magnesiumand being adapted to be used as a deoxidizing agent for iron and caststeel. The object of the invention is to provide a process of producingsuch an alloy that contains magnesium and silicon Which latter substancehas proved a quality improver of considerable value.

It has been proposed to produce a ferromagnesium alloy by addingmagnesium to iron or steel in a semi-fluid state, and to use the alloythus obtained for the purpose of treating iron or cast steel. It hasbeen further proposed to previously alloy the magnesium With nickel oraluminium, and to introduce the thus obtained alloy into an iron orsteel bath, said bath being required to be in semi-fluid state for thatpurpose. The resulting alloy has been applied for refining iron or caststeel.

l/Vhile trying to introduce, in the same manner, silicon into amagnesium alloy intended to be used for the same purpose of deoxidizingironor cast steel, We found that the alloying of silicon and magnesiumoffers considerable difiiculties.

Now, we have discovered that alloys of the desired character can beobtained in a simple and smooth manner by starting with ferro-silicon ina semi-fluid state and adding the magnesium hereto. The magnesium mustbe added to the ferro-silicon when the latter is in a semi-fluid state,that is, not

completely melted. If the addition of the magnesium is delayed until theterro-silicon is completely melted and thinly fluid, only a smallportion of the magnesium will alloy, by far the greater portion beinguselessly consumed. Instead of magnesium, alloys of magnesiuinand anyother metal, may be introduced into the terro -silicon While the same isin a semi-fluid state, such magnesium alloys, for instance, as magnesiumaluminium, or magnesium-nickel. In carrying the invention into effect, aferro-silicon may be used containing silicon to any percentage, forinstance, a ferro-silicon containing from per cent. to per cent.silicon.

For the purpose of effecting a deoxidation of an iron or steel bath,'thethus obtained alloy may be app-lied either in a fluid or in a solidstate.

What We claim as our invention and desire to secure by Letters Patent otthe United States, is:

The method of producing an alloy containing magnesium for use as adeoxidizing agent for iron and rest steel consisting in meltingferro-silicon to a semi-fluid state and. adding magnesium thereto whilein said state.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

GUSTAV PISTOR. ALBERT BEIELSTEIN. ADOLF BECK.

Witnesses as to si nature of Gustav Pistor:

JEAN GRUND, CARL GRUNn. l/Vitnesses as to signatures of AlbertBeielstein and Adolf Beck:

FRIEDRICH INes, EWALD BAUER.

